Cementing bailer



* March 22 192/l7 s. D. coATs ET 1. 1621970 CEMENTING BAILER Filed March 10, 1926 @y MY.

Patented Mar. 22, 1927.

' 1,621,970 fr arrivi .ferritin .SBENGERJDHGQATE aPAUL '2-DAVIS, AlN-ID ABBOTT .B. JENKS, .QFANTAi-FESP'RLINGS, YC .ACLIEFOBJNIA.

'CEMENTING- BINDER.

Application 4inea March ilo, 192e. seriai :No.eegezv.

This invention 4is a dump bailer'l'or cementing .a Well', and it is fthe .object v@if tl-1e invention Y to open the bailer der .discharging cementfatany desired level in a xWellpandto positivelyleckdhe'bailerfin open'position so as/toprevent;closingzthereof when it is ivithdrawn from the Well and vthereby7 insure -di-scharge or' :all: of ythe i cem-ent.

It iis la further object of .the invention .to

1o Open ythe Vliailer `by Etelesccping a. sleeve ithrough abutment of .an impact member against the bottom of the -vJell 'bore seas 'to aline `.ports in thesleeve and bailer -for discharge or' eement, ithe sleeve lbeing normally extended on the ibailer for .non-.alineinent ot' the vports Aso as .to close the .-ibailer :and :pre- .v-ent discharge, of -any cement until 'abutment off 'the impact -member telescopes `the Sleeve to `its limit offmovoment.

' Tc isla rstill fnrtlier object -iotlthe 1 invention 4te provide `a "leclring yconnection between the `impact :member and "bailer adapted :to autematically engage -Wlien the -sleeve is .teleseoped 'its Stull distance, thereby positively retaining the bailer iin open position during subsequent Withdrawal fromithe'ivel'l.

The jinven'tion ivi'lhbe :readily .understood 'from vthe following `description .o'i fthe :accompanying drawings, in jivlii'oh Fig. l is lan yaxial .section :through a Well bore showing vthe ecmenting 'bailer Jin closed position.

Fig. 2 is a similar `View -showing Athe .ee- .mentingbailer open iler-discharge oit cement. Fig. 3 is a Elyragmentary elevation at :night an'gles to Fig. ll and showing :the eenienting lbai'ler closed.

The -Cementing fbailer is ein'ili-iyed in a usual deep Well A adapted Lto :receive the string offcasing l1, 'the caf-jing being 4elevalei-'l 'slightly V-When the welll is ito be ceniienled, so that tliefceeing shoe 2 israbove tliebottem ett :the Well to permit `cement to flow litem the casing and Vupimrdly 'between the same and the fbore.

The dump bailer for the cement may Ebe llowered into v*the casing a11cl-\vitlid1ta\vn by any usual means, Shown "in the present finstance vasa string ,ottubing 3 adapted 'l'or Suspension vof the bailer therefrom by a usual threaded connection 5.

'1`he threaded connection 5 is provided at the upper end of a section of pipe 4 Which forms the bailer proper; and this pipe is closed in spaced relation above its lovver end Asubsecplently `Withdrawn.

byia transverse partition 15, se that whenithe ports '17 :in .the sides ofithe =pipewabeve fthe partition :are l opened, cement `iis :discharged from fthe bailer finto "the well casing.

A sleeve 14 is slidable onipipe 4 and :is 60 limited yin .its downward rmovement by abutinentagainst a col-lar 6 which -is threaded onto the .lower endo-i' pipe 4 as shoivimat .-7. Parts 16 `are @provided-iin atlie sides of sleeve 14 and are adapted 'to .saline with ipoilts li? `65 for discharge oilzcement .when .the `sleeve 'is elevated on .pipe 4, :but Aare ibeloiv ithe 4ports 17 when the sleeve` is at yits normal lower Alimit oi movementinorderite shut ofi discharge of cement.

The sleeve i114 `is elevated fon pipe 'f4 i'from -normal yclosed positionshe-ivn in ilig. .1,1by an impact rod 8 'telesceping 1in fthe 'lower end .oit pipe 4 below partition S15 .and fhaving: a bead 9 forminjgvan Iundercut shoulder 715 l0 which yrests lupon aiflangeof collar :for limiting` extension of the impact 'rod relative to1tl1e bailer pipe. Y

'Elie fteleecoping .rod is lined to sleeve 14 by studs 'f1.2 which project through Y axial 80 slots 13 in pipe 4, thewslot-rand. stud` iconnection maintaining the ports 'i6-1.7 7in longitudinal alinement and limiting elevation of sleeve 14 so `ae tofexactly :aline ithe ports.

As the baifler :is lowered iin a livell, `:the .weight ot' red 8 entendsthesame belcw .pipe 4 yso .as to flower sleeve and .elo'se :ports '17, and when 'the'impact rod Strikestihe bottom of the Well continuedflowcringoi iti-lie bai-ler 94.)

fteleseopes the impact rod 1in pipe 4 and! thereby elevates sleeve 11410 -aline Vpei-ts 16T-17 and fthereby discharge the'fcement :trom :the baifler. A coupling ll is :preferably provided -at the lower .end ol `rod -S 'so that an 95 .extension :B may be connectedwthereto iff .de-

sired, for abutment of the in'ipaet member against the bottoni; oi' the Weill bere when, the lbailer is at any desired level as deter -mined "by the flength of the entension PB.

lVhen the impact rod teleecopesin pipe 4 so asfto r open the y@eme-nt discharge ports. Athe parts are automatically locked fte prevent closing Vof the `ports "I7 leihen-the b21-iler is As :an instanceof this arrangement a latch "18 projects from rod 8 and is adapted for retraction as it passes the flanged collar 6; and When the rod 8 is fully telescoped so as to open ports 17, the latch is above the flanged collar and is again projected so as to seat on the flange ol the collar for preventing relative movement between the impact rod and the bailcr pipe.

The latch 18 is preferably yieldably pro` jected by a spring 21 mounted in the transverse bore 19 in which the latch slides, the spring being held in place by a screw plug 22 and engaging a guide head 20 at the inner end of the latch.

Projection ot the latch is preferably limited-by abutment ot itshead Q0 against a shoulder formed by the bore 19, in order to prevent displacement oi the latch `from the rod 8.

After the bailer has been withdrawn trom the well with the ports 1'4" maintained in open position by the locking engagement ot latch 18, the latch may be retracted to permit return of the parts to normal position with ports 17 closed, by inserting a suitable tool in an aperture 23 which extends through collar 6 in alinement with latch 18.

The improved construction thus provides a normally closed bailer which will not open for discharge of cement until the impact member' is telescoped to its limit ot movement; and as a consequent there is no possibility of accidental discharge of cement through slight telescoping of .the impact member as a result of striking an obstruction in the well.

The invention also provides for positively locking the bailer in its open position to insure discharge of all of the cement as the bailer is subsequently withdrawn from a well.

We claim:

l. A dump bailer comprising a pipe having a transverse partition and a discharge port in the pipe above the partition, an exterior and an interior abutment surface at the lower end of the pipe, a Vsleeve slidable on the pipe and normally resting on the exterior abutment surface, said sleeve having a port in non-alinement with the discharge port and below the partition for closing the discharge port when the sleeve is in normal position, an impact member slidable in and projecting beyond the lower end ot the pipe below the partition and normally extended relative to the pipe, a shoulder on said member engaging the interiorV abutment surface for limiting normal projection oi the impact member, the lower` end ot the pipe being slotted, and pins slidable in'said slots connecting the impact member and the sleeve tor raising the sleeve on the pipe by telescoping of the impact member in the lower end of the pipe to aline the sleeve port with the discharge port so as to open the discharge port.

2. A dump bailer comprising a pipe having a transverse partition and a discharge port in the pipe above the partition, a sleeve slidable on the pipe and having a port in non-alinement with the discharge portv and below the partition for closing the discharge port when the sleeve is in normal position, an impact member slidable in and normally extended beyond the lower end of the pipe below the partition, the lower end of the pipe being slotted, and a connection between the impact member and the sleeve slidable in the slot for raising the sleeve on the pipe by telescoping of the impact member in the lower end of the pipe to aline the sleeve port with the discharge port so as to open the discharge port.

3. A dump bailer comprising a pipe having a transverse partition and a discharge port in the pipe above the partition, a sleeve slidable on the pipe and having a port in non-alinement with the discharge port when 'he sleeve is in normal posit-ion, an impact member slidable in and normally extended beyond the lower end of the pipe below the partition, the lower end of the pipe being slotted, a connection between the impact member and the sleeve slidable in the slot lor raising the sleeve onthe pipe by telescoping of the impact member in the lower end ot the pipe to aline the sleeve port with the discharge port, and cooperating means on the impact member and the lower end of the pipe below the partition for automatically locking the impact member in telescoped position.

4E. A dump bailer comprising a pipe having a transverse partition' and a discharge port in the pipe above the partition, a sleeve slidable on the pipe and having a port in non-alinement with the discharge portwhen the sleeve is in normal position, an impact member slidable in and normally extended beyond the lower end of the pipe below the partit-ion, the lower end of the pipe being slotted, a connection between the impact member and the sleeve slidable in the slot for raising the sleeve on the pipe by telescoping the impact member in the lower end ot the pipe to aline the sleeve port with the discharge port, an interior flange on the lower` end of the pipe, and a yieldable projccting latch on the impact member adapted to automatically engage the flange lor locking the impact member in telescoping position.

In testimony whereof they have allixed their signatures to this specification.

SPENCER D. COATES. PAUL H. DAVIS. ABBOTT B. JENKS. 

